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3 years ago

Hello guys plz help me with this question, i really appreciate if you answer fast, thank you guys

Mathematics

1 answer:

Margaret [11]3 years ago

3 0

Answer:

decay rate is -13 percent in an hour. 3 hours would be (0.87)^3 = 65.85 percent

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What will we end up with when we substitute into the formula?

11Alexandr11 [23.1K]

I can not understand it

8 0

3 years ago

A can of drink costs 32p. The cost of the drink has increased to 38p.

kkurt [141]

Answer:

Jenny's percentage isn't correct

Step-by-step explanation:

You'd have to divide first:

38 / 32 = 1.1875 = (rounded) 1.19%

The percentage increase is 1.19%

3 0

3 years ago

Read 2 more answers

Choose Yes or No to tell whether each expression is equivalent to –43p – 25.

Rashid [163]

Answer:

–43p + (–25) is EQUIVALENT to –43p – 25.

Step-by-step explanation:

<u>The options are MISSING.</u>

The needed options are:

1. 25 – 43p

2. 25 – 43p

3. –25p –43

4. –43p + (–25)

Now, here the given expression is: –43p – 25

Taking each option and simplifying it , we get:

1. 25 – 43p

Here, the second term is NEGATIVE, but the first term (25) is POSITIVE.

⇒ 25 – 43p ≠ –43p – 25

Hence, 25 – 43p is NOT EQUIVALENT.

2. 25 – 43p

Here, the second term is NEGATIVE, but the first term (25) is POSITIVE.

⇒ 25 – 43p ≠ –43p – 25

Hence, 25 – 43p is NOT EQUIVALENT.

3. –25p –43

Here, the variable p is multiplied with (-25) and NOT (-43).

⇒ –25p –43 ≠ –43p – 25

Hence, –25p –43 is NOT EQUIVALENT.

4. –43p + (–25)

Here, both the given terms (43) and (25) are NEGATIVE.

Also, the varibale p is multiplied with (-43)

⇒ –43p + (–25) = –43p – 25

Hence, –43p + (–25) is EQUIVALENT.

5 0

3 years ago

Expression 3 + y and 2 (6+y) are equivalent?

Assoli18 [71]

Answer:

3+y and 12+2y

Step-by-step explanation:

I mean they aren't equivalent because if you do PEMDAS (parenthesis, exponents, multiply, divide, add, subtract) Then, you would do 2 times 6 because parenthesis, that equals 12 so the answer would be

3+y and 12+2y

6 0

3 years ago

If y=8 when x=3 when x=45

Veronika [31]

Answer:

The value of y for x = 45 is 120 .

Step-by-step explanation:

Given as :

Let The variables y and x are proportional to each others

I,e y ∝ x

Now , y = k x

So, for x = 3 , y = 8

I.e 8 = k × 3 ........1

∴ k = $\frac{8}{3}$

<u>Similarly </u>

for x = 45 , y = k × 3

I.e y = k × 45 ..........2

Now, putting the value of k in eq 2

So, y = $\frac{8}{3}$ × 45

I.e y = $\frac{8\times 45}{3}$

Or, y = 8 × 15

∴ y = 120

So, for x = 45 , y = 120

Hence The value of y for x = 45 is 120 . Answer

5 0

3 years ago